Typewriting machine



D. I. GLACKIN. TYPEWRITING MACHINE.

APPLICATION HLED MAY 24, I919. LQQ3 Q75, Pat nted Jan. M 1922..

2 $HEETS-SHEET l.

D. T. GLACKIN.

, TY PEWRITING MACHINE.

APPLICATION HLED MAY 24. I919.

L4U3 75 I Patented JamW, 1922 /d 2 SHEETS-SHEET 2.

lm en far:

entree STATES PATENT crates.

DANIEL T. GLACKIN, OF CHICAGO, ILLINOIS, ASSIGNOR T0 UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y.,

A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Specification of Letters Patent.

Patented J an. Id, 1922.

T 0 all whom it may concern Be it known that I, DANIEL T. GLACKIN, a citizen of the United States, residing in Chicago, in the county of Cook and State of Illinois, have invented certain newand useful Improvements in Typewriting Machines, of which the following is a specification.

This invention relates to typewriting machines, and is herein. disclosed as applied to the carriage of an Underwood standard typewriting machine adapted to do billing work of a character which furnishes a number of identical copies of each bill. Owing to the inconvenience of handling webs in typewriting machines, partly because of their slipping and creeping, it is advantageous to be able to make out a number. of bills upon a comparatively short integral sheet, thus avoiding these and other difiiculties. It is, however, troublesome to insert the separate carbon sheets if a bill of the type described is made out on a fan-folded sheet, inasmuch as such a sheet requires that the carbons shall be inserted from opposite sides.

According to the present invention, if a bill-head need not occupy a length exceeding inches, it may be made out upon a sheet wrapped several times around the platen of the typewriter, there being wrapped therewith, so as to be interposed between the layers, a carbon sheet for making the carbon copies. To enable this to be done rapidly and economically, the typewriter plateninay co-operate with fingers extending far enough around its periphery to carry a work-sheet around the top of the platen as it rises from the printing point, and then bending it backwardly and downwardly to the usual rear feed-roll, thereby reintroducing the work-sheet between the platen and the feedrolls. I

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a fragmentary perspective view of an Underwood typewriter carriage, showing the present invention as applied thereto.

Figure 2 is a perspective view of a paperfinger and its mounting.

Figure 3 is a sectional side view of the platen and shift-frame, showing the billheads wrapped around the platen.

Figure e'is a front View, partly in section, showing the connection between the platen knob and the platen axle.

Figure 5 is a plan view of most of the parts seen in Figure 4.

Figure 6 is a diagrammatic end view, showing the line-space detent. I

Figure 7 is a perspective view of a billhead and its four carbon copies, as removed from the platen when written out and before the carbon paper is removed from it.

Figure 8 is a view similar to Figure 3, but showing the paper-finger in section.

Figure 9 is a diagrammatic perspective view, showing a bill-head wrapped once around the platen.

Figure 10 is a similar view, showing it wrapped twice around the platen.

Figure 11 is a similar view, showing itwrapped three times around the platen.

Figure 12 is a diagrammatic perspective view, showing the bill-head partly written out, and broken away to show how the writ ing is superposed.

The platen 1 is journaled in the ends 2 and 3 of a shift-frame forming part of a carriage 4 and which also includes a rear paper-table 5. \Vhen it is desired to make out a bill of the class described, the sheet 6 is folded, as shown in Figure 7 so that one bill-head copy 8. which is printed upon the back of the sheet 6, is folded over upon a carbon sheet 9, which lies at the back of the rest of the sheet 6, the copy 8 being just the length of the billhcad,-a length identical with the circum ference of the platen. Then the leading edge 1'0 where folded over, is inserted around the platen 1 in the usual manner and the sheet 6 is held against the platen while the platen is turned, thus winding the sheet around the platen, with the result that the bill-head copies 12, 13 and 14 have their identical lines superposed. Then matter typed on the original copy 14 will be copied by the carbon sheet on the copy 13 and upon the third copy 12, the fourth copy 11 and the fifth copy 8. It will be seen that as a result of the folding back. of the forward end of the sheet over the leading end of the carbon sheet 9, the latter will be held in position with reference to sheet 6 when the latter is inserted in the machine. As will appear on a careful inspection of Figure 7, the successive lengths of the sheet 6, forming the bill-head copies 12, 13 and 14, are slightly longer,the difference amounting to less thanof an inch in many kinds of paper, but

depending upon the kind of paper used for the bill-heads. This successive increase in length is necessary if the writing upon the difierent bill-heads is to fall at identical spaces thereon, because when the first billhead is wrapped around the platen its outer surface is of a circumference slightly greater than that of the platen and this increase of the circumference increases with each superposed thickness of the bill-heads.

As clearly appears from an inspection of the figures, especially Figures 3 and 8, it will be seen that the first copy 8 when wrapped around the platen has its bottom edge 15 exactly at the leading edge 10 thus the top line 16 of the bill-head 12 coincides with the leading edge or fold line 10 of the first bill-head when both I are wrapped around the platen. In the same way the top lines 17 and 18 of the bill-heads 13 and 14 coincide with the top or fold line 10. In order to enable the bill-head sheet 6 to be easily passed around the platen thus, it is inserted over thepaper table 5 in the usual way, past the rear feed rolls 19 and the front feed rolls 20, and then is guided up past the usual wing scale 21 which lies substantially atthe printing line. I

In order to guide the leading edge 10 around over the top of the platen, paperfingers 22 may extend down to the, printing line or even down to below the wing scale 21, substantially to the front feed rolls, being supported from a transverse rod 23 which extends from the end 2.to the'end 3. To enable a work-sheet to ride easily under the long stretch of each paper-finger 22 up to the top of the platen, the finger rests upon the work-sheet by a roll 24, which is journaled in up-turned ends 25 of the finger 22. The finger is supported from the rod 23 by slidable brackets 26 which embrace the rod and are held against revolving thereon by a key 27, held. in a spline 28 on the rod by means of a spring 29 of a common form which stretches between the two brackets 26. The brackets 26 are connected by a U- plate 30 and one of the brackets carries an extension 31. having an elbow 32 to which the finger 22 is secured, as by riveting. In order to guide the leading edge 10 downwardly behind the platen to the bite of the rear feed roll 19, thereby insuring the reintroduction of said leading edge between the platen and the feed-rolls there is provided a second finger 33 forming an extension of each finger 22, which is curved so as to fit closely the periphery of the platen, andv extends down nearly to or below the level of the platen axle 34. In order to provide the flexibility of the finger 33 needed to permit the fingers 22 to be swung up around the rod 23, the fingers 33 are each mounted upon a pivot 35 on the elbow 32, and are held against the platen by a spring 35 which is sufficiently strong to confine the leading edge 10 to the surface of the platen if the platen is turned rapidly, but which nevertheless can be sprung easily enough to permit the fingers 22 to be swung up. In order to prevent the spring 35 from swinging the finger 33 too far forwardly, if swung clear of the platen, there may be provided a stop 36, formed at the point of the elbow 32, adapted to limit the throw of the finger. The two fingers 22 and 33 forming the guides for the sheet at each end of the platen may embrace substantially a semi-circumference of the platen. v

In the usual run of typewriting work,.the reintroduction of the leading edge of a work-sheet would be decidedly objectionable, resulting in most cases in ruining such a sheet. According to the present invention, however, such reintroduction. is necessary and provision is made of suitable means to effect this purpose.

In order to enable the finger 33 to be swung up in the manner described, the rod 23 is advantageously further back and lower down than the somewhat similar tie-rod of the usual Underwood typewriting machine, being as herein illustrated considerably to the rear of the periphery of the platen and also almost as low as the upper surface of the platen. In order to enable the worksheet 6 to be inserted as rapidly as possible, 105 the knob 37, instead of being fast to the platen axle 34, is shown as journaled thereon and as fast to a gear wheel 38,, which meshes with a similar idler gear 39. journaled upon a stud 4O projecting from the end 2. To 110 enable the knob to rive the platen, there is fast to the idler gear, a larger gear 41 which meshes with a Small gear 42 fast to the platen axle, the proportion of gears as shown herein being such that a single revolution of 115 the knob will drive the platen four revolutions. In inserting the work-sheet. it may be found advantageous to cast oil the feed rolls 19 and 20 by actuating tli'fusual castofl handle 43, then to insert the work-sheet 120 with its first line at the wing scale 21, then to cast on the feed rolls and rotate the platen by the knob 37 until the work-sheet is completely wound up on the platen. The writing may then proceed in the usual man- 125 ner, the Work-sheet being advanced between the writing lines by actuating the usual linespace handle 44 to rotate the platen by the line-space wheel 4501' by the knob '46 which is fast to the axle 34} .130

To detain the platen with the work-sheet at the proper writing line, the usual linespace detent 17 may be pressed by the spring 48, against the line-space wheel 45. If it is desired in rotating the platen by the knob 37 to release it from the detent 47, the detent may be silenced by actuating the usual silencing cam 49 by its usual handle 50.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. Ina ty ewriting machine, in combination, a revolilble platen, means to guide a Work-sheet from the introductory side of the platen to the printing point, and a reintroducing device-whereby continued rotation of the platen will cause the leading edge of the work-sheet to be introduced a second time between the. platen and said guiding means.

2. In a typewriting machine, in combination, a revoluble platen, feeding means cooperating with said platen to enable rotation of said platen to eifect feeding of a work-sheet, means to introduce the leading edge of the work-sheet between the platen and the feeding means, and reintroducing means whereby upon sufiicient forward movement of the platen the leading edge of the work-sheet so introduced will agaln be introduced between the feeding means and the platen.

'3. In a front-strike typewriting machine having a traveling carriage, the combina tion with a revoluble platen and feeding devicesqto co-operate therewith, of a papertable at the rear of the platen, and reintroducing means including a paper-finger, toward each end of the platen, adapted to travel with the carriage and coming down substantially to the printing line, and rearward extensions connected to said fingers runnin down behind the platen and adapted to gui e a work-sheet coming up in front, over and behind the platen, down and in, to enter between said platen and feeding devices.

I. In a front-strike typewriting machine having a traveling carriage, the combination with a revoluble platen and feeding devices to co-operate therewith, of a papertable at the rear of the platen, and reintroduci ng means including a paper-finger, toward each end of the platen, adapted to travel with the carriage and coming down substantially to the printing line, spring ex tensions of said fingers extending downwardly at the rear of the platen and adapted to have a large swing w en sprung, and a bar on which the fingers are laterally shiftable. I

5. In a typewriting machine, in combination, a platen. a platen frame in which said platen is revolubly mounted, a rod fixedly supported at its ends in the ends of the platen frame, a. paper-guiding device comprising a frame having an elongated bearing connection with said rod, a paper-finger fixed to said frame and extending down the front of said platen, a rearwardly extending paper-finger pivoted on said frame. a spring to hold the last-mentioned finger against the platen, and means to limit the movement of the pivoted finger under the influence of its spring, and means yieldably holding the frame against rotation about extensions pivoted to saidfingers and curved to fit the platen closely, and a. spring for each extension adapted to hold it against the platen.

7. In a front-strike typewriting machine, the combination with a revoluble platen, of a rear paper-table, feeding devices to tooperate with the platen to bring a worksheet to the printing line, and paper-guiding devices extending substantially from the printing point, backwardly far enough to guide the work-sheet between said platen andsaid feeding devices.

8. In a front-strike typewriting machine, the combination with a revoluble platen and an axle therefor, of a rear paper-table, feeding devices to co-operate with said platen to bring a work-sheet to the printing line, reintroducing means whereby the leading edge may be guided around said platen and again introduced between the latter and said feeding devices, said reintroducing means including paper-guiding devices extending substantially from the printing point, backwardly far enough to guide the work-sheet between said platen and feeding devices, a knob j ournaled on said axle, and mutiplying means whereby a sheet having a succession of forms, eachadapted to extend once around the platen, may be wound around said platen by giving said knob a complete turn.

9. In a front-strike typewriting machine having a traveling .carriage, the combination with a revoluble platen and feeding devices to co-operate therewith, of a papertable at the rear of the platen, reintroducing means including a paper-finger, toward each end of the platen, adapted to travel with the the platen axle, and members slidably cax' riage and coming down substantially to splined to said rod and supporting said 10 thedprintingd lfine, rearwflu'd extelnsiong pilxlrfingers. ote to sai. in ers ant eurvec to t t e 5 platen closely, a d. a spring for each exten- DANIEL GLAOKIN' sion adapted to hold it against the platen, \Vitnesses: a platen frame in which the platen is jonr- K. F. SELLERS, naled, a. rod in said frame behind and above E. MEAsEY. 

